Flush-valve.



s. F. FAlRBANK.

FLUSH VALVE.

-APPLICAT|0N FILED was 27. ms.

Patented Apr.13, 1915.

SIIIAS F. FAIR-BANK. F OGDEN, UTAH.

. more.

FLUSH-VALVE.

To all whom it inui/ concern which the following is a specification.

My invention relates toa simplified and improved construction of automatic, delayed-closing flush valves. .Thecharacteristics-and advantages of the invention will be pointed out hereafter iii-connection with a detailed description of the accompanying drawing, which illustrates one exemplifying embodiment of the invention.

It is to be understood that theinvention is capable of embodiment in different forms.

Figure 1 is a vertical section. Fig. 2 is a horizontal section. just above the mainvalve seat. Fig. 3 is an enlarged vertical section through the main valve and adiacent parts, in' a plane at right angles to Fig. 1, and Fig. 41s a detail of the wing valve or flush valve. 7

. Reference character 1 designates a main cylinder having a separate parallel water passage 2 communicating with the cylinder near the top by means of port 3 and at the bottom by'port 4. The opening of port t is regulated by a screw 5. Passage 2 continues ast port 4 and communicates with outlet of flush pipe 6 through a valve seat 7, which is normally closed by a valve '8, which may be called for identification a release valve. This is held to its seat by a spring 9. Water enters from the supply pipe 10 through a regulating valve 11 which is adjusted in accordance with local condi-' tions of pressure and flow.

At the bottom of main cylinder 1 is main valve-seat 12, with which main valve 13.00- operates. This main valve has on top an annular recess 14, which cooperates with the downwardly-extending flange 15 of cap 16. The main valve also has a central recess 16', in which is loosely mounted refill valve 17 The main valve Washer 18 is se- Specification of Letters Patent; Patented Apr. 13,, 1915.. Application and June 27, 1913. Serial a... 776,135.

passage is controlled bya screw 22. Below the refill valve. in a transverse cylindrical bore 25, is a valve which may be identified as a flush valve or shutter valve 26. The thin central part of this valve normally stands vertical, as shown in Fig. 1, and is provided with a member 27 engagingthe stem of releasevalve 8. Shutter. valve 26 has annular heads 27 and al stem 28, to which the flush handle 29 is secured. One

. of the heads is provided with an are shaped notch 30, about an eighth of its circumference and 1n this engages the end of stop screw 31.

To-flush, handle 29 is pulled, rotating shutter-valve 26 left-handed, as seen in Fig.

1. The shutter-valve thus closes the main outlet and at the same time release valve is opened. Pressure is thus relieved above main valve 13, which rises to the top, and is cushioned and stopped by air contained incap16 com 'iressed by means of the water seal afforded by flange l5 entering annular recess 14: of the main valve. A body of water is thus placed under the main valve and when the handle is released, shutter-valve 26 returns to vertical position andthis body of water is discharged through the flush pipe 6 until the main valve'lB candescend by reason of supplying of water above it through port 4 and passage 2.

When the mainvalve was raised, refill valve 17 dropped and as the main valve iagain approaches its seat, refill valve 1''? first seats and cuts off. the main flow and refilling v is then accomplished by water lvingbelow the main valve passing through by-pass 21.

Finally, themain valve seats and overflow is cut oif after refilling has been accomplished. Co ipcration of the refill valve with the main valve also insures easy sea-t ing of the latter. 1

Suitable caps 40 and washers ll are provided to cover the stem of valve 11 and the 190 spring of release ,valve 8 and adjusting screw 5.

I claim 2'- 1. In a flush valve, the combination of a body having a main valve cylinder'and a by-pass communicating with said cylinder at top and bottom, a iuain valve freely movable in said cylinder and having an annular top recess, an air-domein the top of the cylindcr and a flange adjacent thereto to cooperatewith the recess in said valve, a main valve seat at the bottom of the cylinder, a

shutter valve below said seat, a. release valve at the bottom of said by-pass and a connection between said shutter valve and said release valve.

- y 2. In a'fiush valve, the combination of a,

body having a'main valve cylinder and a bypass communicating with said cylinder at top and bottom, a main valve freely movable in said cylinder and having an annular top recess, an'air-dome in the top of the cylinder and a flange adjacent thereto to cooperate with the recess in said valve, a main valve seat at the bottom of the cylinder, :1

Shutter valve at the bottom of saicl by-pass and a connection between said shutter valve and said release valve, the main valve being provided with a bottom central recess, a refill valve below the main valve mounted in said bottom reoess, and a refill valve seat between eaid main valve seat and said shutter SILAS F. FAIRBANK. 

